Available as a software package or as a managed service, MailSite MP is part of the award-winning Rockliffe MailSite suite of email server and email gateway solutions that have been meeting the performance, scalability and reliability requirements of service providers and businesses since 1995. MailSite MP provides any email server with real-time anti-virus and anti-spam protection, content and attachment filtering, automatic blocking of denial of service and directory harvest attacks, protection against email fraud including "phishing", and the ability to enforce corporate email policies.